SouthernWorldwide.com – A newly identified muscle protein might offer insights into why individuals who remain active as they age often maintain greater strength and better health for longer periods, according to recent research.
Scientists discovered that a protein known as NOX4 naturally diminishes with age and reduced physical activity. As its levels decreased, researchers observed indicators of frailty, muscle deterioration, insulin resistance, and liver disease in mice.
These findings were published in the journal Science Advances.
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The research team posits that NOX4 plays a crucial role in muscle self-repair and adaptation to the physical stresses of exercise.
When NOX4 was experimentally removed from the muscles of mice, the animals exhibited reduced strength, a loss of muscle mass, and developed health issues commonly linked to the aging process.
Furthermore, the study revealed that exercise had the effect of restoring NOX4 levels in older mice.
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“Movement is medicine,” stated Hunt.
“The emerging NOX4 research is exciting because it helps explain something exercise scientists have observed for decades. Physical activity does far more than strengthen muscles.”
Hunt elaborated that many people perceive exercise primarily as a means to improve physical appearance or fitness levels, but its beneficial effects extend much deeper.
“Exercise appears to activate biological signaling pathways that help the body adapt, repair and become more resilient over time,” she explained.
She highlighted that a significant takeaway from the study is the role of physical activity in helping the body retain its capacity to recover from challenges.
“Exercise does not simply help us look younger or stay physically fit,” Hunt emphasized. “It appears to help the body maintain its ability to adapt, repair and respond to stress.”
Hunt added that healthy aging encompasses more than just extending lifespan.
“Healthy aging is not just about adding years to life,” she said. “It is about preserving strength, function, independence, cognitive health and overall quality of life.”
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The researchers underscored the need for further studies, but their current findings could potentially explain why consistent physical activity remains one of the most effective strategies for maintaining health as individuals age.
It is important to note that the study was conducted using mice, which means the results may not directly translate to human physiology.
Although the research team also analyzed muscle samples from both younger and older men and observed similar declines in NOX4, more extensive research is necessary to fully comprehend the protein’s function in human aging.
